diff --git a/src/shared/dissect-image.c b/src/shared/dissect-image.c
index f1149cdaa6..db813a7eb4 100644
--- a/src/shared/dissect-image.c
+++ b/src/shared/dissect-image.c
@@ -717,7 +717,7 @@ static int acquire_sig_for_roothash(
 
         ssize_t n = pread(fd, buf, partition_size, partition_offset);
         if (n < 0)
-                return -ENOMEM;
+                return -errno;
         if ((uint64_t) n != partition_size)
                 return -EIO;